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venting system

DuraFlex AL (DFAL) aluminum flexible relining for masonry chimney. Use with natural gas or liquid propane category I, draft hood equipped appliances, and appliances tested and listed to use Type B Gas Vent. Applications include: natural gas fireplaces, gas-fired furnaces, boilers, water heaters, and wall or space heating applications

Applicable Standards

  • UL 1777

    Chimney Liners

  • ULC S635

    Standard for Lining Systems for Existing Masonry or Factory-Built Chimneys and Vents

View on Manufacturer's Website

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